Yes, the famous we-can-change-the-contract-if-enough-people-don’t-like-you provision. Does it only apply to return policy? Or could CostCo also, say, change th

Yes, the famous we-can-change-the-contract-if-enough-people-don’t-like-you provision. Does it only apply to return policy? Or could CostCo also, say, change the price retroactively? Does it work the other way around? Say I order from Amazon. Then, I notice many people don’t like them. Labor safety, no paid sick leave, etc. Can I refuse to pay? I’ll tell them why and they can better themselves.